English verb conjugation
COULD UNDERLOAD

Regular verb: underload - underloaded - underloaded

Affirmation

Simple form	V-ing form
I could underload you could underload he could underload we could underload you could underload they could underload	I could be underloading you could be underloading he could be underloading we could be underloading you could be underloading they could be underloading
Perfect	V-ing perfect
I could have underloaded you could have underloaded he could have underloaded we could have underloaded you could have underloaded they could have underloaded	I could have been underloading you could have been underloading he could have been underloading we could have been underloading you could have been underloading they could have been underloading

Negation

Simple form	V-ing form
I could not underload you could not underload he could not underload we could not underload you could not underload they could not underload	I could not be underloading you could not be underloading he could not be underloading we could not be underloading you could not be underloading they could not be underloading
Perfect	V-ing perfect
I could not have underloaded you could not have underloaded he could not have underloaded we could not have underloaded you could not have underloaded they could not have underloaded	I could not have been underloading you could not have been underloading he could not have been underloading we could not have been underloading you could not have been underloading they could not have been underloading

Interrogative form

Simple form	V-ing form
could I underload? could you underload? could he underload? could we underload? could you underload? could they underload?	could I be underloading? could you be underloading? could he be underloading? could we be underloading? could you be underloading? could they be underloading?
Perfect	V-ing perfect
could I have underloaded? could you have underloaded? could he have underloaded? could we have underloaded? could you have underloaded? could they have underloaded?	could I have been underloading? could you have been underloading? could he have been underloading? could we have been underloading? could you have been underloading? could they have been underloading?

Interro-negative form

Simple form	V-ing form
could I not underload? could you not underload? could he not underload? could we not underload? could you not underload? could they not underload?	could I not be underloading? could you not be underloading? could he not be underloading? could we not be underloading? could you not be underloading? could they not be underloading?
Perfect	V-ing perfect
could I not have underloaded? could you not have underloaded? could he not have underloaded? could we not have underloaded? could you not have underloaded? could they not have underloaded?	could I not have been underloading? could you not have been underloading? could he not have been underloading? could we not have been underloading? could you not have been underloading? could they not have been underloading?